Please Help! 1992 Lumina 3.1 Euro,cranks,won't Start!

I have LUMINA 3.1 EURO which i kept in very good condition

few days ago i was not able to start
cranks over but no start
i have checked for spark-NO SPARK
also i have installed brand new Fuel pump, so gas is comming into engine(i tested)

i suspected ignition module, i went to scrap yard and purchased ignition module/coil pack for $100 cdn
installed propertly in hope for best
cranked again-NO START AGAIN!

what else could be here?
i am not getting any bad lights on dashboard, so everithing looks ok
also, all fuses are ok

are they any fusible links in this model?
i suspect now crankshaft sensor?

please help?

if is sensor, where is located, how to get to?

i am really desperate, please help me!

this is my first post!

Regards!

i have checked voltage according to book on pin where it should came on ign. module with key in ON position
there is no voltage

again all fuses are ok
is it possible that key is not sending voltage or?

please help me, this is nightmare!

First off, if you checked for spark, and didnt find any, why did you go and replace the fuel pump? If there is no voltage to the ignition module, I would either suspect a fuse. or maybe even a bad ecm computer. Check the fuses, especially the ones under the hood. And also any wiring that looks as if it may have gotten cracked or melted or cut. And yes, could be the crank sensor, I have no idea as to where these are, someone will be along shortly to help ya out with this one, but I believe there are 2 of them. Or is that just later model 3.1's? I dont really know. Good luck.

Due respect here, but you sound like you are in over your head here, you would at minimum need a wiring diagram and a trouble tree chart for no spark/injector pulse. As mentioned check the pcm fuses. The crank sensor could cause this but an unpowered icm must be resolved first.

well. i should not tell about pump, since this is something i did 2 weeks before this ignition problem
i know it is not related, but i just wanted to tell history of recent problems!
this car never had ignition problem


i have checked all fuses including under glove box compartment and ones in the engine compartment
they are all good

i am electronics engineer and have very good understanding of circuits generally, and this looks like there is cut between IGN. MODILE and ECM computer

what is confusing here is this, in book it is stated :if voltage on ignition fuse is less than 7v, check circuit from KEY to the ign. module
in schematic diagram for car OUTPUT voltage for ign. module is comming FROM ECM!
so i guess it is defective ECM or ling between ecm and ign. modul

to be more simple: key in on position, all fuses ok.all voltages ok BUT NO VOLTAGE ON CONNECTOR ON IGN. MODULE!!!

is my computer bad? or wire between

any ideas?

looks like ECM is between ign. module and key, so when key is in RUN position ECM gets voltage and output voltage is generated to supply ignition module
this is according to original manual/schematic for this car

i did self diagnostic on ecm shows no error codes, and shows it is in diagnostic mode
does this indicates that ECM is ok?
personally i don't suspect any bad wires from ECM to ign. module

when measured voltage on ign. module connector i found that on pin where it should be 12v there is no voltage, but very low voltage soething in mv, less than half v
this indicates that other end of wire is connected
most likely ECM is not giving out this voltage for ign. module

also i am discarding for now possibility of crank sensor since i have missing voltage to solve first

on scrap yard they ara asking $75 for used ECM
numbers should match?

is it reasonable to swap ECM to try? for this price?

please help!

If you are sure that pin should have 12v, then jump it and see what happens.

i am sure it is stated in book:with key in RUN position check for voltage on 6 pin connector on ign. module

in order to "jump" that wire i have to cut it from ECM so it will not go back to ECM and dammage it!

this is what i was thinking of ang that is next logical step to do to isolate problem

I have a 91 Eruo with 3.1 Liter "T" engine. I just quit altogether, it would turn over like crazy, but would not start. I found that I had no spark. I took the ignition control module off (with the 3 coils attached), took it to auto zone and had them check it. The 3 coils were weak but still within specs. The ICM on the other hand was completely dead. Nothing. I bought a new one right there and the girl put it on the test device to show me the difference. Wow! It was only 90 bucks so I don't know why you would get one from a junk yard. I put it on and that sucker fired right up. Get the darn thing checked, take your guess work out of the equation so you know if you have a good one or not. It's a little hard to get on and off but it sure fixed my problem. I have since put 3000 trouble free miles on it, it gets 26 miles per gallon.

crank sensors are common problems on these cars. It is located on the back of the block, slightly towards the passenger side, just above the oil pan rail. It is secured to the block with one screw, and has a 2-wire connector. MAke sure you swap your prom chip with the one in the junkyard, as even though the ecm's have the same number, the proms may be different and incompatible. Since your ECM is mounted under the hood and exposed to the elements, I would inspect the Ign module wiring harness and the harness at the ECM for corroded terminals before plunking down $75 on a guess, especially since it's a junkyard part and may be no better than what you now have.

Hyperbusa_al, i have already replaced ignition module it DID NOT WORK!
basically i bought very good LUMINA yesterday for $1200 cdn

i have to fix old one
i have pulled computer and checked bad connections
all looks like new!

i pulled connections and pushed back

NO VOLTAGE TO IGN. MODULE
ign module i replaced wasted $120, it wasnot ign. module
it doesnot get power
since i have bought good car(same model, not EURO) i am going to measure voltage on ign. module connector to compare

then if there is voltage on good car, i am going to buy ECM from junk yard for $75 and try it
i dont think it is issue with connectors
car just quit one morning
previousnigh i was driving and all was ok
next morning tried to start, cranks forever but no start
replaced ign. module i was sure that was problem without checking voltage on it
well, this is good lesson! never assume but check first to isolate problem
now i have narowed down problem
it is not ign. module it is between module and ECM or ECM itself!
cannot be anything else!!!
all fuses are ok, all! checket 5 times all and measured voltage on them

i have car now, but i have to solve mystery on old one! then i am going to sell old one, inexpensive
i have paid 4700 for old one and it was excellent
i have replaced fuel pump recently and water pump before
i have car almosr 2 years
it was always starting good
when i bought car it had one coil bad
that was reason why it was only $700
replaced one of coils and car was running ok
sometimes i had bit of hesitation but didnot complain for this price
car was cosmetically very good
it has bucket seats and aluminum rims
this is EURO 3.1 ABS
very responsive car
i like it because i know many things about but THIS IGNITION PROBLEM DRIVES ME CRASY!!!

IT HAS TO BE ECM, IT HAS TO BE

if anyone knows exactly, please help me solve this mystery
i am frustrated because i am able to find anything on cars
iu am very technical and analitical but this is something i didnot have before on any car
TOTAL MYSTERY!